典型文献
Site index for Chinese fir plantations varies with climatic and soil factors in southern China
文献摘要：
Chinese fir[Cunninghamia lanceolata(Lamb.)Hook.]has a large native distribution range in southern China.Here,we tested differences in productivity of Chi-nese fir plantations in different climatic regions and screened the main environmental factors affecting site productivity in each region.Relationships of a Chinese fir site index with climatic factors and the soil physiochemical properties of five soil layers were examined in a long-term positioning observation trial comprising a total of 45 permanent plots in Fujian(eastern region in the middle subtropics),Guangxi(south subtropics)and Sichuan(central region in the mid-dle subtropics)in southern China.Linear mixed effects models were developed to predict the site index for Chi-nese fir,which was found to vary significantly among dif-ferent climatic regions.Available P,total N,bulk density and total K were dominant predictors of site index in three climatic regions.The regional linear mixed models built using these predictors in the three climatic regions fit well(R2=0.86-0.97).For the whole study area,the available P in the 0-20-cm soil layer and total N in the 80-100-cm soil layer were the most indicative soil factors.MAP was the most important climatic variable influencing the site index.The model evaluation results showed that the fitting per-formance and prediction accuracy of the global site index model using the climatic region as the dummy variable and random parameters and the most important soil factors of the three climatic regions as predictors was higher than that of global site index model using the climatic variable and the most indicative soil variables of the whole study area.Our results will help with further evaluation of site quality of Chinese fir plantations and the selection of its appropriate sites in southern China as the climatic changes.
文献关键词：
中图分类号：
作者姓名：
Xiaoyan Li;Aiguo Duan;Jianguo Zhang
作者机构：
State Key Laboratory of Tree Genetics and Breeding,Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration,Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,People's Republic of China;Collaborative Innovation Center of Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,People's Republic of China
文献出处：
引用格式：
[1]Xiaoyan Li;Aiguo Duan;Jianguo Zhang-.Site index for Chinese fir plantations varies with climatic and soil factors in southern China)[J].林业研究（英文版）,2022(06):1765-1780
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AB值：
0.428469
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